Yankees' Hicks may need Tommy John surgery

Boone added the situation is "still kind of a gray thing" after Hicks got a second opinion on his elbow from Dr. Neal ElAttrache.

"We're trying to get as many smart people as we can looking at this," Boone said. "But it's frankly something that's not real clear as what the course of action should be."

ElAttrache and team physician Christopher Ahmad could not confirm if Hicks needs the procedure on his ulnar collateral ligament.

"When you look at how they read the MRIs, it's not clear that something needs to be done," Boone explained. "The reality is that he hasn't responded yet to the first shutdown and how he came back. Hopefully, we'll all make the right choice in time here."